Orange Pi Zero 4 Packs an A733, 3 TOPS NPU, and PCIe 3.0 Into a $26.50 SBC

Orange Pi's Zero line has always been about fitting a surprising amount of hardware into a small footprint, but the new Orange Pi Zero 4 pushes that idea further than its name suggests.

At just 55 × 50mm, barely bigger than a couple of postage stamps, the Zero 4 packs an eight-core processor, dedicated AI acceleration, Wi-Fi 6, PCIe 3.0, Gigabit Ethernet, dual camera interfaces, and two 4K-capable display outputs.

Pricing starts at just $26.50.

The biggest change is the move to the Allwinner A733, replacing the quad-core Cortex-A53 setup found in the H618-powered Orange Pi Zero 3.

The A733 uses a heterogeneous eight-core CPU layout:

The two Cortex-A76 cores handle heavier workloads, while the six Cortex-A55 cores can take care of lighter tasks and background processes. It is a big.LITTLE-style configuration that is becoming increasingly common among newer A733-based boards.

The RISC-V E902 core serves a different purpose. It is not intended to run Linux alongside the Arm cores. Instead, it can operate as a small real-time coprocessor for workloads that benefit from predictable timing or isolation from the main operating system.

That could make it useful for robotics, industrial control, sensor processing, and other embedded applications where Linux handles the high-level workload while the E902 takes care of time-sensitive tasks.

The A733 also includes a 3 TOPS neural processing unit.

That is not enough for large AI models, but it should be plenty for smaller edge AI workloads such as object detection, image classification, basic voice processing, and other lightweight inference tasks.

More importantly, Orange Pi paired that NPU with actual camera connectivity.

The Zero 4 includes two 4-lane MIPI CSI camera interfaces, making it a natural fit for computer vision projects, smart cameras, robotics, security systems, and other applications that would otherwise require an external AI accelerator.

Orange Pi is positioning the board for uses including machine vision, AIoT devices, industrial gateways, and compact edge servers. Given the hardware onboard, those use cases make sense.

Orange Pi is currently listing five memory configurations:

A 16GB configuration also appears in the specifications, although Orange Pi has not listed that version for sale or announced pricing.

Depending on the configuration, the board supports LPDDR4, LPDDR4X, or LPDDR5 memory.

For now, it is probably best to consider 8GB the practical maximum until the 16GB model actually becomes available.

Even 8GB is a substantial amount of memory for a board this small and should be enough for containers, small servers, heavier Linux workloads, and many edge AI applications.

A microSD slot supporting cards up to 128GB covers the basics, but Orange Pi has also designed the Zero 4 for faster onboard storage.

Available storage options include:

UFS 3.0 is particularly interesting.

MicroSD storage is often one of the biggest performance bottlenecks on inexpensive SBCs. Faster onboard storage can make a noticeable difference when running databases, containers, development environments, or server workloads with frequent disk access.

UFS also gives the Zero 4 a storage option normally associated with much more expensive mobile and embedded hardware.

The Zero 4 includes a PCIe 3.0 x1 interface through a 16-pin FPC connector.

With the proper adapter, that opens the door to NVMe SSDs and other PCIe peripherals.

This is one of the more important additions to the Zero line because it changes what the board can realistically be used for.

A tiny SBC with Gigabit Ethernet, several gigabytes of RAM, and NVMe storage can become a surprisingly capable compact server, NAS controller, network appliance, or edge computing system.

That is a much different proposition from an inexpensive SBC limited primarily to microSD storage.

Display connectivity is also unusually generous for a board this size.

The Zero 4 provides:

The two outputs can drive independent displays, making the board useful for digital signage, dashboards, kiosks, compact desktop systems, and dual-screen embedded applications.

The A733's multimedia hardware also supports H.265, VP9, and AVS2 decoding at resolutions up to 8K24, along with H.264 and H.265 encoding up to 4K30.

Those capabilities could make the Zero 4 particularly interesting for media players and compact video applications.

Networking is another area where Orange Pi has packed in a lot of hardware.

The Zero 4 includes:

The combination of wired Gigabit Ethernet and Wi-Fi 6 gives the board plenty of flexibility for networking projects, IoT gateways, edge servers, and remotely deployed systems.

It is also a step up from the Zero 3, which uses Wi-Fi 5 and Bluetooth 5.0.

Despite its compact size, the Zero 4 still provides plenty of expansion for maker and embedded projects.

A 26-pin color-coded GPIO header exposes GPIO along with UART, I2C, and SPI interfaces.

There is also a separate 13-pin header carrying additional GPIO, I2S, USB, and infrared receiver signals.

Other onboard connections include:

Power comes through a dedicated USB-C connector at 5V/3A.

A second USB-C port handles USB 3.1 OTG and DisplayPort output, meaning the display-capable USB-C connection does not have to double as the board's primary power input.

The difference between the Zero 4 and the familiar Zero 3 becomes obvious when the specifications are placed side by side.

There is an important bit of context here, though.

The Zero 3 is not actually the Zero 4's closest relative on paper. Orange Pi already brought the A733 into the Zero family with the Orange Pi Zero 3W, a narrower 65 × 30mm board released earlier this year.

In many ways, the Zero 4 looks more like an evolution of that platform.

It adds Gigabit Ethernet, changes the expansion layout, and reshapes the board into the familiar 55 × 50mm Zero footprint.

The Zero 3 comparison is still useful because that is the board many existing Orange Pi users are more likely to own, but the dramatic specification jump partly represents two steps of hardware development rather than a single generation.

Orange Pi is not alone in adopting the Allwinner A733.

Radxa's Cubie A7S uses the same chip, including the eight-core CPU configuration and 3 TOPS NPU, in a similarly compact 51 × 51mm footprint.

It also includes Gigabit Ethernet, Wi-Fi 6, Bluetooth 5.4, and PCIe 3.0 x1.

One notable difference is display connectivity. The Cubie A7S relies on USB-C DisplayPort, while the Orange Pi Zero 4 provides both Mini HDMI and USB-C DisplayPort.

As more A733 boards appear, the differences between them are increasingly going to come down to I/O layout, expansion options, pricing, and software support rather than processor performance.

The silicon underneath is becoming very similar.

The hardware looks impressive, but software support is the biggest reason to avoid judging the Zero 4 solely by its specifications.

At launch, Orange Pi's download pages for Ubuntu, Debian, Android, and Orange Pi OS have not yet been fully populated.

That is not especially unusual for a newly released Orange Pi board, but it does mean early buyers may need to be patient.

The earlier Zero 3W gives us some idea of what could happen next. Linux images based on Ubuntu and Debian eventually appeared, along with Android support, although Orange Pi OS support has been less consistent.

Community distributions such as Armbian may also arrive, but early support is likely to rely heavily on Allwinner and Orange Pi's vendor kernel.

Mainline Linux support for the A733 is still something to watch.

That matters because CPU support is only part of the equation. GPU acceleration, NPU support, camera interfaces, video encoding and decoding, PCIe, and other peripherals all depend on working drivers.

For anyone considering the Zero 4 for a serious project, the quality of those drivers may ultimately matter more than another few hundred megahertz of CPU performance.

Current pricing starts at:

The 16GB configuration listed in the specifications is not yet available.

The 4GB version has also begun appearing through third-party retailers, including listings around $67.99 on Amazon US.

As usual with Orange Pi hardware, third-party retail pricing can be noticeably higher than pricing through Orange Pi's primary sales channels.

That makes the $26.50 headline price attractive, but buyers should pay attention to the actual cost of the memory configuration they want, along with shipping and any required accessories.

The Orange Pi Zero 4 is much more than a minor refresh.

It combines eight Arm CPU cores, a 3 TOPS NPU, a RISC-V real-time processor, Wi-Fi 6, Gigabit Ethernet, PCIe 3.0, optional UFS storage, dual camera interfaces, and two 4K-capable display outputs on a board measuring just 55 × 50mm.

The $26.50 1GB model should be especially appealing for embedded projects where memory is not the priority.

Move up to 4GB or more, add faster storage through UFS or PCIe, and the Zero 4 starts looking much more like a legitimate small Linux server, AI vision system, networking appliance, or compact desktop.

The biggest wildcard is software support.

If Orange Pi delivers stable Linux images with reliable GPU, NPU, camera, and PCIe drivers, the Zero 4 could become one of the most interesting budget SBCs of 2026.

On hardware alone, there is a lot here for $26.50.